DOI: 10.1016/j.watres.2019.01.059
Scopus记录号: 2-s2.0-85061917151
论文题名: Biological treatment of selenate-containing saline wastewater by activated sludge under oxygen-limiting conditions
作者: Zhang Y. ; Kuroda M. ; Arai S. ; Kato F. ; Inoue D. ; Ike M.
刊名: Water Research
ISSN: 431354
出版年: 2019
卷: 154 起始页码: 327
结束页码: 335
语种: 英语
英文关键词: Activated sludge
; Oxygen-limiting conditions
; Saline wastewater
; Selenate bioreduction
; Sequencing batch reactor
英文摘要: Selenium often coincides with high salinity in certain industrial wastewaters, which can be a limitation in the practical application of biological treatment. However, there are no studies on the biological treatment of selenate-containing saline wastewater. A sequencing batch reactor inoculated with activated sludge was applied to treat selenate in the presence of 3% (w/v) NaCl. Start-up of the sequencing batch reactor with a 7-day cycle duration and excessive acetate as the sole carbon source succeeded in removing above 98% and 72% soluble and solid selenium, respectively, under oxygen-limiting conditions. Further selenium removal experiments with a shorter cycle duration of 3 days and a stepwise decrease of acetate addition achieved soluble and total selenium removal efficiencies in most batches above 96% and 80%, respectively. Mass balance analysis revealed that selenate was converted into elemental selenium, most of which was accumulated in the sludge. Microscopic analyses also found that elemental selenium particles were primarily present as approximately 2 μm large rods, with some extremely large particles above 10 μm. Although the bacterial populations responsible for selenium removal, especially selenate reduction, could not be identified by microbial community analysis, this study reported for the first time that selenate could be biologically treated in the presence of considerable salinity, offering implications for the practical treatment of selenium in certain industrial wastewaters. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/121933
Appears in Collections: 气候变化事实与影响
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作者单位: Division of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan; Nippon Steel & Sumitomo Metal Corporation, 20-1 Shintomi, Futtu, Chiba 293-8511, Japan
Recommended Citation:
Zhang Y.,Kuroda M.,Arai S.,et al. Biological treatment of selenate-containing saline wastewater by activated sludge under oxygen-limiting conditions[J]. Water Research,2019-01-01,154